Read each example and decide what the resulting effect on the gene pool of that population would be. A zebra migrates to join a different herd of zebras.

Competition for sunlight leads to taller trees.

The DNA of a snake changes to make its venom stronger.

A grassfire randomly sweeps through a population of buffalo and kills most of the animals.

creates new alleles from DNA

brings new alleles from other populations

randomly selects alleles

favors certain alleles

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.